(19)
(11) EP 0 415 459 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.05.1991 Bulletin 1991/21

(43) Date of publication A2:
06.03.1991 Bulletin 1991/10

(21) Application number: 90116880.7

(22) Date of filing: 03.09.1990
(51) International Patent Classification (IPC)5: F16D 69/02
(84) Designated Contracting States:
DE ES FR GB IT SE

(30) Priority: 01.09.1989 JP 228153/89
29.08.1990 JP 229091/90

(71) Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Osaka-shi, Osaka 541 (JP)

(72) Inventors:
  • Nakagawa, Mitsuhiko, c/o Itami Works Sumitomo
    Itami-shi, Hyogo (JP)
  • Yamashita, Yukinori, c/o Itami Works Sumitomo
    Itami-shi, Hyogo (JP)
  • Kishimoto, Hiroya, c/o Itami Works Sumitomo
    Itami-shi, Hyogo (JP)
  • Masanori, Ibuki c/o Itami Works Sumitomo
    Itami-shi, Hyogo (JP)

(74) Representative: Herrmann-Trentepohl, Werner, Dipl.-Ing. 
Patentanwälte Herrmann-Trentepohl, Kirschner, Grosse, Bockhorni & Partner Forstenrieder Allee 59
81476 München
81476 München (DE)


(56) References cited: : 
   
       


    (54) Friction material and method of manufacturing therefor


    (57) A friction material and a method of manufacturing therefor by which problem on hygienic environment can be solved and brake noise at the time of braking can be effectively prevented while preventing reduction of braking due to decrease of a friction coefficient as possible as it can. The friction material is granulated by a binder and includes an inorganic substance having a plane netlike crystal structure which configuration of the granulation is deformed flat by both or either of pressure and heat during the formation. Accordingly, the inorganic substance having the plane netlike crystal structure causes microseparation to easily occur in the friction surface, whereby the friction material effectively preventing brake noise in braking can be obtained.







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